CVE-2020-1900 | BDVDB-2026-150270 Detail

Description#

When unserializing an object with dynamic properties HHVM needs to pre-reserve the full size of the dynamic property array before inserting anything into it. Otherwise the array might resize, invalidating previously stored references. This pre-reservation was not occurring in HHVM prior to v4.32.3, between versions 4.33.0 and 4.56.0, 4.57.0, 4.58.0, 4.58.1, 4.59.0, 4.60.0, 4.61.0, 4.62.0.

Impact#

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Exploit#

History#

1. Version 12021-03-11Record published in the CVE List.
2. Version 22024-08-04Most recent update recorded in the CVE List.